Data Repository 1: Summary of ages of samples from Nahal Yael and Nahal Mekorot (see also Amit et al., 2007) Sample Depth

(m) ext.

(Gy/a) De (Gy) K KF

(%) K

(%) U

(ppm) Th

(ppm) Int.

(Gy/a) ext.

(Gy/a) ext.

(Gy/a) Youngest age (ka)

Dose rate (Gy/a)

Age (ka)

Nahal Mekorot MKC-1 0.02 144 4.0 2500250* 62* MKC-2 0.5 932 953 3.7 1.5 1.1 2.7 170 141 1264 2507104 37.92.0 MKT-1 0.25 404 4.3 1.1 0.8 2.0 197 107 950 193147 20.71.9 MKT-2 0.5 853 424 3.4 1.2 1.0 2.5 165 127 1078 222395 19.02.1 MKT-3 1.3 982 9211 5.2 1.4 1.1 2.3 238 131 1221 2573107 35.74.4 MKT-4 1.7 1291 1143 5.1 1.6 1.7 4.4 234 228 1543 3296144 34.61.8

Nahal Yael Alluvial Fan Site

NYF-1 0.3 1067 549 3.5 1.5 1.3 4.0 160 188 1389 2804121 19.23.3 NYF-2 0.85 1195 574 4.2 1.7 1.5 4.9 192 220 1545 3152135 18.01.5 NYF-3 1.3 1159 602 4.0 1.8 1.7 4.5 183 226 1658 3226134 18.60.9 NYF-4 1.85 1206 793 4* 1.8 1.4 4.0 183 194 1611 3195141 24.61.5 NYF-5 2.45 1269 939 3.7 1.9 1.7 4.2 170 219 1711 3358144 27.62.9 NYF-7 0.4 1068 516 3.2 1.4 1.3 3.2 105 166 1296 2635118 19.81.6 NYF-8 0.7 1033 624 2.0 1.5 1.5 3.5 92 188 1404 2716117 22.91.7

Terrace site

NYC-1 0.02 324 5.4 2800* 132* NYC-2 0.7 1064 1324 2.9 1.4 0.9 2.2 133 113 1134 2444186 53.84.3 NYT-1 0.15 1120 564 4.1 1.5 0.9 2.1 188 114 1270 2690120 20.81.6 NYT-2 0.35 1181 1007 4.5 1.5 1.4 3.2 206 172 1406 2965129 33.62.9NYT-3 1.2 1181 717 4.2 1.8 0.9 2.1 192 112 1485 2971125 24.02.7 NYT-4 1.9 1164 1044 3.7 1.5 1.5 3.4 170 186 1389 2909128 35.82.2

* Dose rate values estimated from nearby samples.

H1

H7

H6

H5H3

H2

Data Repository 3: Cosmogenic Isotopic Data

Sample CAMS

# Measured Ratio Blank Ratio Blank Corrected

Ratio Quartz Mass

Be carrier

Total Al Measured 10Be Measured 26Al 26Al/10Be

(g) (ug) (ug) 141NYW1 BE10052 2.58E-13 +/- 6.60E-15 2.64E-14 +/- .50E-15 2.33E-13 +/- 9.99E-15 31.49 254 1.13E+05 +/-4.86E+03 6.43 141NYW2 BE10053 6.19E-13 +/- .30E-14 2.64E-14 +/- .50E-15 5.97E-13 +/- .50E-14 51.66 254 1.77E+05 +/-4.44E+03 6.86 141NYW4 BE10054 9.35E-13 +/- .69E-14 2.64E-14 +/- .50E-15 9.15E-13 +/- .85E-14 58.11 254 2.41E+05 +/-4.87E+03 6.83 141BLANK BE10051 2.36E-14 +/- 6.15E-15 2.37E-14 +/- 6.15E-15

141BLANKX BE10058 2.93E-14 +/- 4.29E-15 2.94E-14 +/- 4.29E-15

130NYW5 BE9524 6.12E-13 +/- .62E-14 3.81E-14 +/- 5.40E-15 5.75E-13 +/- .68E-14 35.72 253 2.46E+05 +/- .14E+04 6.85 130NYW6 BE9525 5.66E-13 +/- .44E-14 3.81E-14 +/- 5.40E-15 5.28E-13 +/- .54E-14 39.19 252 2.05E+05 +/-5.97E+03 7.35 130BLANK BE9522 3.80E-14 +/- 5.40E-15 3.81E-14 +/- 5.40E-15

129NYW3 BE9533 3.20E-13 +/- .04E-14 2.97E-14 +/- .70E-15 2.91E-13 +/- .14E-14 26.94 253 1.65E+05 +/-6.47E+03 7.56 129BLANK BE9532 2.96E-14 +/- 4.70E-15 2.97E-14 +/- 4.70E-15

141NYW1 AL5247 4.59E-13 +/- .50E-14 4.13E-15 +/- .62E-15 4.55E-13 +/- .51E-14 31.49 2258 7.28E+05 +/- 4.01E+04 141NYW2 AL5248 8.41E-13 +/- .66E-14 4.13E-15 +/- .62E-15 8.36E-13 +/- .67E-14 51.66 3362 1.22E+06 +/- 3.88E+04 141NYW4 AL5249 1.10E-12 +/- 3.57E-14 4.13E-15 +/- .62E-15 1.10E-12 +/- 3.58E-14 58.11 3909 1.65E+06 +/- 5.37E+04 141BLANK AL5245 1.50E-15 +/- .50E-15 1.50E-15 +/- .50E-15

141BLANKX AL5252 6.75E-15 +/- .15E-15 6.75E-15 +/- .15E-15

130NYW5 Al4976 1.04E-12 +/- 3.68E-14 1.50E-15 +/- 8.50E-16 1.04E-12 +/- 3.68E-14 35.72 2601 1.68E+06 +/- 5.98E+04 130NYW6 Al4977 8.77E-13 +/- 3.03E-14 1.50E-15 +/- 8.50E-16 8.75E-13 +/- 3.03E-14 39.19 3025 1.51E+06 +/- 5.22E+04 130BLANK Al4970 1.50E-15 +/- 8.50E-16 1.50E-15 +/- 8.50E-16

129NYW3 AL5012 7.27E-13 +/- 5.97E-14 2.65E-15 +/- .65E-15 7.25E-13 +/- 5.98E-14 26.94 2078 1.25E+06 +/- .03E+05 129BLANK AL5011 2.65E-15 +/- .65E-15 2.65E-15 +/- .65E-15

Notes: Samples prepared in 1998 using standard extraction methods at the University of Vermont and analyzed after being mixed with Ag at Livermore National Laboratory in 1999. Be data referenced to KNSTD3110 with an assumed value of 3110. Measured 10Be concentration as adjusted for published value of this standard that is now 10.6% lower (Nishiizumi et al., 2007). One or two full process blanks using similar amounts of carrier as the unknowns were included with each batch of 8. Batch specific blank ratios were subtracted from measured isotope ratios. SPEX 1000 ppm carrier was used.